Wildcatter Hunts His Next Gusher

By

Gregory Zuckerman

Sept. 21, 2012 8:33 p.m. ET

OKLAHOMA CITY—On the national scene, wildcatter Harold Hamm has arrived. The rags-to-riches oil magnate now is one of Mitt Romney's top energy advisers and recently testified in Congress about energy independence.

But on Wall Street, Mr. Hamm's company, Continental Resources Inc., is facing questions about whether it can continue trouncing the competition.

Mr. Hamm is among the biggest winners of the continuing boom in U.S....